When we put the arpeggiation pattern that we just learned into a progression, the notes become 8th notes and we play two repetitions of the pattern per measure. Our progression is: 1 measure of G, 1 measure of C (and in this case, Cadd9), 1 measure of D, and 1 measure of G. When you consider all of this, you'll play the pattern for G twice, Cadd9 twice, etc.

Remember that you count this pattern "1 and 2 and 3 and 4 and". Also, if any one particular part of the progression gives you any trouble, work each chord individually or view the previous lesson to become more grounded in the technique needed to execute this progression.